BURLINGTON, Vt. (AP) — The Vermont Health Department says the second case of human illness from West Nile virus in the state this year has been confirmed. A Chittenden County resident became ill in in late September and has since recovered.

This season, West Nile virus has been detected in mosquito pools in 12 different towns including Milton and Colchester in Chittenden County.

Mosquito surveillance was conducted mainly in southern Addison and northern Rutland Counties with limited trapping and testing done in parts of Franklin and Chittenden counties.

The peak of West Nile activity is usually in late August and early September, but officials caution mosquitoes will remain active until the first widespread hard frost.

Symptoms of West Nile virus typically include high fever, muscle aches, headache and fatigue.